简便运算:33×37
来源:学生学帮网 编辑:学帮网 时间:2024/07/06 21:10:30
简便运算:33×37
33×37
=﹙35-2﹚﹙35+2﹚
=35²-4
=﹙30+5﹚²-4
=30²+2×30×5+5²-4
=900+300+25-4
=1221
33*37=1221
33×37
=11×111
=1221
简便运算:33×37
33×37
=﹙35-2﹚﹙35+2﹚
=35²-4
=﹙30+5﹚²-4
=30²+2×30×5+5²-4
=900+300+25-4
=1221
33*37=1221
33×37
=11×111
=1221